The device which produces highly coherent
sources is
(a) Fresnel biprism (b) Young’s double slit
(c) Laser (d) Lloyd’s mirror
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The device which produces highly coherent sources is Laser.
Explanation:
A laser is a device that emits light by stimulation of electromagnetic radiation. It is different from other sources because of its ability to produce highly coherent light. Theodore H. Maiman, an American engineer and physicist was the first person to build a laser, in 1960.
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